26o Records of the Indian Museum. [Vol. XIII, 



pointed and is much longer than broad; the preceding portion, 

 which, as in the other species, appears to comprise three fused 

 segments, is obscurely grooved in the middle line ; its lateral 

 margin is angulate near the middle and in front of this point is 

 distinctly concave. 



The carapace of the largest specimen, an adult male, is about 

 4*4 mm. in length. 



The species is described from fourteen specimens, including 

 a number of ovigerous females, obtained on the shores of the 

 Mandavi river at Nova Goa in Portuguese India. They were found 

 at low water under stones on a muddy bank. At the time they 

 were taken the water in the river was brackish, the specific gravity 

 being about i"ooio. 



With this species I have associated the name of Capt, Froilano 

 de Melo, Director of the Bacteriological Laboratory of the Insti- 

 tuto de Analises e Vacina at Nova Goa. I am greatly indebted 

 to Capt. de Melo for the assistance he gave me during my visit to 

 Portuguese India, especially for facilities for the investigation of 

 the very interesting fauna of the Mandavi river. 



The types bear the number 9741/10 Zool. Surv. Ind. 



Rhynchoplax exiguus, sp. nov. 



The carapace is ovate and is widest a little behind the middle 

 point; its upper surface, rostrum included, is a little longer than 

 broad. In an adult female (text-fig. 10) the portions of the cara- 

 pace above the bases of the first two pairs of walking legs are 

 swollen, covered with stiff hairs and project beyond the upturned 

 lateral margin of the carapace ; in males these parts are not vis- 

 ible in dorsal view. There is no tooth or process above the base of 

 the first walking legs or on the antero-lateral margin. The upper 

 surface is a little sunken, covered with fine hairs, and with the 

 usual grooves sharply defined. The rostrum is composed of three 

 lobes set with stiff setae. The median lobe is depressed and longer 

 than the other two ; in the adult female it is narrow and parallel- 

 sided, in males broader at the base and triangular. 



The eye is unusually large ; the entire cornea and a portion 

 of the stalk is visible from above, together with a large and very 

 conspicuous post-ocular tooth. The antennules when folded are 

 completely concealed beneath the front ; at their base they are 

 separated by a well-marked septum. 



The epistome is comparatively long. The buccal cavern is of 

 the usual form and is not nearly closed by the external maxilli- 

 pedes. The merus in the latter appendage is a little longer than 

 the ischium and expanded antero-externally, partially concealing 

 the exopod The stalk of the exopod, as in R. naso, is long and 

 projects a little beyond the endopod when the segments are nor- 

 mally flexed. 



The chelipedes of male specimens (which are perhaps not full 

 grown) resemble those of the female, the chela being only a little 



